/**
 * OSAmI: Open Source Ambient Intelligence
 * Copyright (C) 2010 Bull S.A.S.
 * Contact: osami-general@osami-commons.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 */

package org.osami.gateway.storage.naive.internal;

import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.Instantiate;
import org.apache.felix.ipojo.annotations.Provides;
import org.osami.gateway.alarm.IAlarm;
import org.osami.gateway.storage.IAlarmStorage;

import java.io.FileWriter;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;

@Component
@Instantiate
@Provides
public class NaiveAlarmStorage implements IAlarmStorage {

	private FileWriter writer;

	private Map<String, IAlarm> alarms;

	public NaiveAlarmStorage() {
		this.alarms = new Hashtable<String, IAlarm>();
		this.writer = null;

		try {
			writer = new FileWriter("NaiveAlarmStorageOutput.txt", true);

			writer.write("----------\n");
			writer.flush();
		}
		catch (IOException ioe) {
			ioe.printStackTrace();
		}
	}

	public IAlarm remove(String identifier) {
		synchronized(alarms) {
			IAlarm alarm = alarms.remove(identifier);
			if (writer != null) {
				try {
					writer.write("Removing alarm for ID \"" + identifier + "\" at " + System.currentTimeMillis() + ": ");
					writer.write(alarm.toString());
					writer.write("\n");
					writer.flush();
				}
				catch (IOException ioe) {
					ioe.printStackTrace();
				}
			}
			return alarm;
		}
	}

	public void store(IAlarm alarm) {
		synchronized(alarms) {
			if (writer != null) {
				try {
					writer.write("Adding alarm for ID \"" + alarm.getIdentifier() + "\" at " + System.currentTimeMillis() + ": ");
					writer.write(alarm.toString());
					writer.write("\n");
					writer.flush();
				}
				catch (IOException ioe) {
					ioe.printStackTrace();
				}
			}
			alarms.put(alarm.getIdentifier(), alarm);
		}
	}

	public Iterator<IAlarm> iterator() {
		return alarms.values().iterator();
	}
}
